Chemistry, 04.11.2020 23:30 ejcastilllo
1. 1. How much heat energy (q) would be needed to warm a 100g sample of lead (Pb) from 21°C to 621 °C where melting occurs. (c of Pb = .129 J/g °C) q= m= C= AT = (Twarmer - Tcooler)
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Chemistry, 22.06.2019 00:30
What does x represent in the formula for the compound xcl4?
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Chemistry, 22.06.2019 08:40
Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride
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Chemistry, 22.06.2019 17:50
Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?
Answers: 2
1. 1. How much heat energy (q) would be needed to warm a 100g sample of lead (Pb) from 21°C to 621 °...
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